Hi, welcome to justanswer.com! My name is Mike.I am going over your question and I will be with you shortly.
Do you have a Time Machine Backup of your original Mac?
OK that would have been the easiest way. There is no guarantee that Photoshop that worked on 10.6.8 will still run on a new Mac with a new processor and new system but we can try. You have to connect them both to the same WiFi network then use the Migration assistant in Applications / Utilities. https://support.apple.com/en-us/HT204350
I can help you by remote if you get stuck
Do you still need help?